youtube-dl has this in their FAQ:

> Do I always have to pass -citw?

> By default, youtube-dl intends to have the best options (incidentally, if you have a convincing case that these should be different, please file an issue where you explain that ( https://yt-dl.org/bug )). Therefore, it is unnecessary and sometimes harmful to copy long option strings from webpages. In particular, the only option out of -citw that is regularly useful is -i.

But OK, here's explantion of the options you used:

• -f best: Select the best quality format represented by a single file with video and audio. (By default, yt-dl will merge best video with best audio if that's what's available.)

• -c: Force resume of partially downloaded files. (By default, yt-dl will resume downloads if possible.)

• -i: Continue on download errors, for example to skip unavailable videos in a playlist.

• -t: Use title in file name. (Deprecated. This is the default.)

• -w: Do not overwrite files.

• -v: Print various debugging information.